<md-toolbar>
  <div class="md-toolbar-tools">
    <md-button onclick="history.back()">
      <md-icon class="material-icons">keyboard_backspace</md-icon>
    </md-button>
    <h1>
      {{title}}
    </h1>
  </div>
</md-toolbar>

<style>
  md-toolbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
  }
</style>